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CAT Wheel Tractor-Scraper 631K

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Tractor Engine

Flywheel Power: Tractor/Scraper
425 kW

Scraper Bowl

Scraper Capacity: Heaped
26 m3
Scraper Capacity: Heaped
26 m3


Top Speed (Loaded)
55.8 km/h
Top Speed (Loaded)
55.8 km/h


Engine Model: Tractor
Cat C18 ACERT™
Flywheel Power: Tractor
425 kW
Cat C18 ACERT engine meets U.S. EPA Tier 2/EU Stage II Equivalent emission standards.
Rated Engine RPM: Tractor
1900 rpm
8808 mm


Width – Overall Machine
3937 mm
Width – Tractor
3499 mm
Width – Inside of Bowl
3404 mm
Height – Overall Shipping
3892 mm
Ground Clearance – Tractor
664 mm
Front of Tractor to Front Axle
3612 mm
Axle to Vertical Hitch Pin
509 mm
Height – Scraper Blade Maximum
510 mm
Rear Axle to Rear of Machine
2744 mm
Length – Maximum (Push-Pull)
16640 mm
Length – Overall Machine (Standard)
15164 mm
Width – Rear Tire Centers
2462 mm
Overall Length
15.04 m

Dimensions (Approximate)

Width - Outside Rear Tires
3636 mm
Height – Top of Cab
3733 mm

Travel Speeds (Runout)

Transmission Gear: Eighth
55.8 km/h
Transmission Gear: Fifth
22.7 km/h
Transmission Gear: First
5.5 km/h
Transmission Gear: Fourth
16.9 km/h
Transmission Gear: Reverse
9.9 km/h
Transmission Gear: Second
10.0 km/h
Transmission Gear: Seventh
41.4 km/h
Transmission Gear: Sixth
30.6 km/h
Transmission Gear: Third
12.4 km/h


Operating Weight (Empty)
48275 kg
Overall Length (With Bail Down)
16.64 m
Operating Weight (Empty)
46600 kg

General Data

180° Curb-to-Curb Turning Width
12.23 m
Fuel Tank Refill Capacity: Scraper
874 L
Maximum Depth of Spread
535 mm
Overall Shipping Height
3.89 m
Rated Load
37 200 kg (82,200 lb); 37.2 tonnes (41.1 tons)
Scraper Capacity: Struck
18.3 m3
Tires: Scraper
Tires: Tractor
Width of Cut
3.51 m

Blade Range

Maximum Depth of Cut
450 mm


Overall Width
3.94 m


Exterior Sound Level
The exterior sound power level for the standard machine (ISO 6393) is 111.5 dB(A).


ROPS/FOPS meet “ISO Standards.”
Brakes ISO 3450:2011

Implement Cycle Times

Apron Lower
3.8 secon
Apron Raise
4.0 secon
Bail Lower
2.1 secon
Bail Raise
1.5 secon
Bowl Lower
3.5 secon
Bowl Raise
3.5 secon
Ejector Extend
8.5 secon
Ejector Retract
8.5 secon

Service Refill Capacities

Cooling System
75 L
Crankcase (Tractor)
52 L
Fuel Tank
874 L
Hydraulic System
142 L
Transmission System
110 L
Steering System
ISO 5010:2007

Safety Criteria Compliance Standards

Falling Object Protective Structure (FOPS)
ISO 3449:2005 Level II
Reverse Alarm
ISO 9533:2010
Rollover Protection Structure (ROPS)
ISO 3471:2008 for up to 21 282 kg (46,919 lb)
Seat Belt
SAE J386:FEB2006

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